61407 Freshwater MPS Test Strips The Freshwater Hot Spring Spas Salt Water Test Strips provide a comprehensive and efficient means of testing and maintaining the pH levels, total alkalinity, and hardness in your hot tub. While similar to pool water management, spa and Jacuzzi tubs' higher temperatures and smaller water volume present unique challenges, including faster chemical reactions and increased evaporation rates - meaning it's vital to test the levels of your water regularly! To test your Hot Springs Spa, simply dip the test strip into the water and then compare the colors on the test strip with those on the bottle. To keep your Spa water clean and balanced is important! Test the water before and after each use and to treat it regularly. We recommend tracking your results each time you test. Hot Spring Spa Supplies carries spa fragrances, air & water valves, control systems, filter accessories, lights, cleaners, pumps, thermostats, and more for virtually every hot spring model.